BlendLuxCore IES Omnidirectional Point Source Doesn't Match Luxcore Point Source in Intensity
Posted: Sun Mar 28, 2021 12:27 pm
I created an IES file with Easy IES. It's a 360 degrees omnidirectional and emitting equal intensities from all directions
For the Blender setup two point white light sources with 80 candela intensities (Luxcore IES Lights and Luxcore Point Source light) and each is situated at the center of two similar 100% matte hemisphere objects with radii of 1 meter. For rendering Total Path Depth is set to 1 to disable all indirect bounce lights inside the hemisphere.
After analyzing the results I found that the illuminances and luminances on both illuminated hemisphere objects are different. Checking the color values in the linear EXR file indicated that their luminances differ by a factor of around 12.6 and the Luxcore IES Lights illuminated hemisphere object dimmer than Luxcore point light illuminated hemisphere object.
Why do they differ despite both are set at the same intensities??? I also don't think the Lumen values in the IES file has any effect on the intensities as well.
For the Blender setup two point white light sources with 80 candela intensities (Luxcore IES Lights and Luxcore Point Source light) and each is situated at the center of two similar 100% matte hemisphere objects with radii of 1 meter. For rendering Total Path Depth is set to 1 to disable all indirect bounce lights inside the hemisphere.
After analyzing the results I found that the illuminances and luminances on both illuminated hemisphere objects are different. Checking the color values in the linear EXR file indicated that their luminances differ by a factor of around 12.6 and the Luxcore IES Lights illuminated hemisphere object dimmer than Luxcore point light illuminated hemisphere object.
Why do they differ despite both are set at the same intensities??? I also don't think the Lumen values in the IES file has any effect on the intensities as well.